Panel rod



H. JUNKERS.

PANEL ROD.

APPLICATION FILED JUNE 28,1920.

l k lg. Pa ented Aug 8 1922s PATIENT @FFHGE.

HUG-0 JUNKERS, 0F DESSAU, GERMANY.

PANEL ROD.

Application filed June 28,

Specification of Letters Patent.

Patented Aug. 8, 1922.

192Q. Serial No. 392,589.

(GRANTED UNDER THE 2ROVISIONS OF THE ACT 01'' MARCH 3, 1921, 41 STAT. 14., 1313.)

To all whom it may concern:

Be it known that I, HUGO JUNKERs, a citizen of the German Empire, residing at Des'sau, Germany, have invented certain new and useful Improvements in Panel Rods (for which I have filed applications in Germany January 30, 1918, Netherlands June 21, 1919, Sweden December 6, 1912, Norway December 31, 1919, Denmark December 19, 1919), of which the following is a specification. I

This invention relates to panel rods and more especially to sheet metal strips adapted to take up pressure acting in a longitudinal direction by being contracted transversely in such a-manner, that longitudinally extending corrugations are produced, which are deepest in the middle and are gradually becoming flatter towards the ends. Preferably the longitudinal edges of the rod are bent at right angles in opposite directions all over the length of the rod.

In the drawings afiixed to this specification and forming part thereof the preferred form of a panel rod embodying the principles of my invention is illustrated. In the drawings 1 F i'g. 1 is a perspective view and Fig. 2 is a cross section taken on the line 1-1 in Fig. 1.

The rod shown in the drawings is formed of a flat sheet metal strip whose longitudinal edges a and b are bent at rightangles in opposite directions throughout the length of the rod. At the assembling points the edge directed towards the contacting surface is beveled or out off as shown at e, so that a straight contacting face is produced on the strip. The rod is shown as being attached to tubular frame work rods f by means of rivets g. The greater part of the rod is contracted transversely in such a manner, that longitudinally extending corrugations (c and d) are produced. Towards the ends of the rod the corrugations become gradually flatter and ter- .minate in the straight end portions 71.

. I claim:

.1. A sheet metal panel rod comprising flat end portions and a middle portion contracted transversely and having a longitudinal corrugation formed therein.

2. A sheet metal panel rod comprising flat end portions and a middle portion contracted transversely and having. a longitudinal corrugation formed therein, whose walls are highest in the middle of the rod.

3. A sheet metal panel rod comprising flat end portions and a middle portion contracted transversely, and having a longitudinal corrugation formed therein,, the longitudinal edges of said rod being bent at'right angles.

4. A sheet metal panel rod comprising flat end portions and a middle portion contracted transversely and having a longitudinal corrugation formed therein, the longitudinal edges of said rod being bent at right angles in opposite directions.

5. A sheet metal panel rod comprising flat end portions and a middle portion contracted transversely and having a. longitudinal corrugation formed therein, the

longitudinal edges of said rod being bent at right angles and one of said edges being bevelled at both ends.

In testimony whereof I aflix my signature.

' HUGO J UNKERS. 

